基于响应面法的UHPC复合胶凝材料体系优化研究  

Optimization study of ultra-high performance concrete composite cementitious material system based on response surface method

作　　者：李响 王佳男 胡江海 付文翔 徐方[2] LI Xiang;WANG Jianan;HU Jianghai;FU Wenxiang;XU Fang(Hubei Wuma Expressway Co.,Ltd.,Wuhan 430010,China;Faculty of Engineering,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]湖北武麻高速公路有限公司,湖北武汉430010 [2]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《混凝土与水泥制品》2024年第5期17-22,28,共7页China Concrete and Cement Products

基　　金：国家自然科学基金项目(51908522);湖北省交通运输厅科技计划项目(2022-11-6-1);山东高速集团科技计划项目(HSB2020119);山东省企业技术创新项目(202060100083)。

摘　　要：采用基于响应面法(RSM)的D-optimal最优化设计方法设计了超高性能混凝土(UHPC)净浆配合比,研究了复合胶凝材料组分对UHPC净浆湿堆积密实度、力学性能、干燥收缩性能的影响,结合XRD、SEM等微观测试结果分析了复合胶凝材料组分间的相互作用机理。结果表明:粉煤灰和硅灰可有效提高UHPC净浆的湿堆积密实度,优化基体内部颗粒堆积状态;硫铝酸盐水泥和粉煤灰对UHPC净浆的早期强度影响显著,掺入硫铝酸盐水泥可大幅提高UHPC净浆的早期力学性能。The D-optimal optimization design method based on response surface methodology(RSM)was used to design the slurry proportion of ultra-high performance concrete(UHPC).The influence of composite cementitious material components on wet packing density,mechanical properties,and drying shrinkage performance of UHPC slurry was studied,and the interaction mechanism between composite cementitious material components was analyzed by using XRD,SEM,and other microscopic test results.The results show that fly ash and silica fume can effectively improve the wet packing density of UHPC slurry and optimize the particle packing state inside the matrix.Sulfoaluminate cement and fly ash have a significant impact on the early strength of UHPC slurry.Adding sulfoaluminate cement can significantly improve the early mechanical properties of UHPC slurry.

关 键 词：超高性能混凝土 胶凝材料体系 响应面法 净浆 硫铝酸盐水泥 干缩 

分 类 号：TU528.01[建筑科学—建筑技术科学]